I bought a key+remote+immobilizer for Toyota for $20. Got it cut for $3 and programmed the immobilizer and the remote myself for free.
You need a working spare key to be able to program it. If you dont have any key at all then you will have to bite the bullet and pay whatever the dealership asks.
12.6v is good. It says that the battery is around 90% charged.
100% charge has 12.7 Volt
90% charge has 12.6 Volt
50% charge has 12.1 Volt
Dead battery has less than 11.5 volts
Some brands e.g. kingston have low (almost half) write speeds. You can check benchmarks online.
Samsungs are pretty good. 120 GB is low, go for something bigger.
It is not illegal. Neither is mining nor using it.
You can join a mining pool and the mining pool's website will give you all the information including the software and their configuration.
You wont get much profits using a single card though.
MCB Lite. You can get one with low limits w/o any source of income and you can use this anywhere online.I had this card but the last time I used it was 2 years ago so I dont know about its current state.
First you need to buy a major currency like ETH, LTC or BTC with fiat money. I prefer ETH or LTC for fast transactions and low transfer fees. I dont know how to do buy them in Pakistan, maybe others can help.Once you have ETH you can transfer it to an exchange wallet like Binance and trade ETH...
Just an update. I was initially using Blockfolio but recently moved to Delta, which is much better than Blockfolio.I have also started using cointracking.info which also has a mobile app. I really like the ability to import csv files exported by the exchanges.